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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (c) 2004-2011 QOS.ch<a name="line.2"></a>
<span class="sourceLineNo">003</span> * All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * Permission is hereby granted, free  of charge, to any person obtaining<a name="line.5"></a>
<span class="sourceLineNo">006</span> * a  copy  of this  software  and  associated  documentation files  (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "Software"), to  deal in  the Software without  restriction, including<a name="line.7"></a>
<span class="sourceLineNo">008</span> * without limitation  the rights to  use, copy, modify,  merge, publish,<a name="line.8"></a>
<span class="sourceLineNo">009</span> * distribute,  sublicense, and/or sell  copies of  the Software,  and to<a name="line.9"></a>
<span class="sourceLineNo">010</span> * permit persons to whom the Software  is furnished to do so, subject to<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the following conditions:<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * The  above  copyright  notice  and  this permission  notice  shall  be<a name="line.13"></a>
<span class="sourceLineNo">014</span> * included in all copies or substantial portions of the Software.<a name="line.14"></a>
<span class="sourceLineNo">015</span> *<a name="line.15"></a>
<span class="sourceLineNo">016</span> * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,<a name="line.16"></a>
<span class="sourceLineNo">017</span> * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF<a name="line.17"></a>
<span class="sourceLineNo">018</span> * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND<a name="line.18"></a>
<span class="sourceLineNo">019</span> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE<a name="line.19"></a>
<span class="sourceLineNo">020</span> * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION<a name="line.20"></a>
<span class="sourceLineNo">021</span> * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION<a name="line.21"></a>
<span class="sourceLineNo">022</span> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>package org.slf4j.helpers;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.ConcurrentMap;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.slf4j.IMarkerFactory;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.slf4j.Marker;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>/**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * An almost trivial implementation of the {@link IMarkerFactory}<a name="line.34"></a>
<span class="sourceLineNo">035</span> * interface which creates {@link BasicMarker} instances.<a name="line.35"></a>
<span class="sourceLineNo">036</span> * <a name="line.36"></a>
<span class="sourceLineNo">037</span> * &lt;p&gt;Simple logging systems can conform to the SLF4J API by binding<a name="line.37"></a>
<span class="sourceLineNo">038</span> * {@link org.slf4j.MarkerFactory} with an instance of this class.<a name="line.38"></a>
<span class="sourceLineNo">039</span> *<a name="line.39"></a>
<span class="sourceLineNo">040</span> * @author Ceki G&amp;uuml;lc&amp;uuml;<a name="line.40"></a>
<span class="sourceLineNo">041</span> */<a name="line.41"></a>
<span class="sourceLineNo">042</span>public class BasicMarkerFactory implements IMarkerFactory {<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>    private final ConcurrentMap&lt;String, Marker&gt; markerMap = new ConcurrentHashMap&lt;String, Marker&gt;();<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    /**<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * Regular users should &lt;em&gt;not&lt;/em&gt; create<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * &lt;code&gt;BasicMarkerFactory&lt;/code&gt; instances. &lt;code&gt;Marker&lt;/code&gt;<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * instances can be obtained using the static {@link<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * org.slf4j.MarkerFactory#getMarker} method.<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public BasicMarkerFactory() {<a name="line.52"></a>
<span class="sourceLineNo">053</span>    }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>    /**<a name="line.55"></a>
<span class="sourceLineNo">056</span>     * Manufacture a {@link BasicMarker} instance by name. If the instance has been <a name="line.56"></a>
<span class="sourceLineNo">057</span>     * created earlier, return the previously created instance. <a name="line.57"></a>
<span class="sourceLineNo">058</span>     * <a name="line.58"></a>
<span class="sourceLineNo">059</span>     * @param name the name of the marker to be created<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * @return a Marker instance<a name="line.60"></a>
<span class="sourceLineNo">061</span>     */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public Marker getMarker(String name) {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        if (name == null) {<a name="line.63"></a>
<span class="sourceLineNo">064</span>            throw new IllegalArgumentException("Marker name cannot be null");<a name="line.64"></a>
<span class="sourceLineNo">065</span>        }<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span>        Marker marker = markerMap.get(name);<a name="line.67"></a>
<span class="sourceLineNo">068</span>        if (marker == null) {<a name="line.68"></a>
<span class="sourceLineNo">069</span>            marker = new BasicMarker(name);<a name="line.69"></a>
<span class="sourceLineNo">070</span>            Marker oldMarker = markerMap.putIfAbsent(name, marker);<a name="line.70"></a>
<span class="sourceLineNo">071</span>            if (oldMarker != null) {<a name="line.71"></a>
<span class="sourceLineNo">072</span>                marker = oldMarker;<a name="line.72"></a>
<span class="sourceLineNo">073</span>            }<a name="line.73"></a>
<span class="sourceLineNo">074</span>        }<a name="line.74"></a>
<span class="sourceLineNo">075</span>        return marker;<a name="line.75"></a>
<span class="sourceLineNo">076</span>    }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>    /**<a name="line.78"></a>
<span class="sourceLineNo">079</span>     * Does the name marked already exist?<a name="line.79"></a>
<span class="sourceLineNo">080</span>     */<a name="line.80"></a>
<span class="sourceLineNo">081</span>    public boolean exists(String name) {<a name="line.81"></a>
<span class="sourceLineNo">082</span>        if (name == null) {<a name="line.82"></a>
<span class="sourceLineNo">083</span>            return false;<a name="line.83"></a>
<span class="sourceLineNo">084</span>        }<a name="line.84"></a>
<span class="sourceLineNo">085</span>        return markerMap.containsKey(name);<a name="line.85"></a>
<span class="sourceLineNo">086</span>    }<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>    public boolean detachMarker(String name) {<a name="line.88"></a>
<span class="sourceLineNo">089</span>        if (name == null) {<a name="line.89"></a>
<span class="sourceLineNo">090</span>            return false;<a name="line.90"></a>
<span class="sourceLineNo">091</span>        }<a name="line.91"></a>
<span class="sourceLineNo">092</span>        return (markerMap.remove(name) != null);<a name="line.92"></a>
<span class="sourceLineNo">093</span>    }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    public Marker getDetachedMarker(String name) {<a name="line.95"></a>
<span class="sourceLineNo">096</span>        return new BasicMarker(name);<a name="line.96"></a>
<span class="sourceLineNo">097</span>    }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span>}<a name="line.99"></a>




























































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